Autacoids
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Questions and Answers

Which of the following is NOT a function of prostaglandins?

  • Sensitizing nerves to pain
  • Initiating blood clotting
  • Producing protective mucous in stomach (correct)
  • Stimulating immune cells to cause inflammation
  • Which enzyme does aspirin inhibit at the enzyme level?

  • Phospholipase A2
  • Cyclooxygenase (correct)
  • Lipooxygenase
  • Prostaglandin E2
  • How does aspirin relieve prostaglandin-induced pain, fever, and inflammation?

  • By stimulating the immune cells
  • By sensitizing the nerves to pain
  • By constricting blood vessels
  • By blocking prostaglandin synthesis (correct)
  • What is one of the functions of prostaglandins in the body?

    <p>Increasing body temperature</p> Signup and view all the answers

    How does aspirin treat inflammation from some autoimmune diseases?

    <p>By blocking prostaglandin synthesis</p> Signup and view all the answers

    What effect do prostaglandins have on blood vessels?

    <p>They can constrict or dilate blood vessels</p> Signup and view all the answers

    How do prostaglandins sensitize nerves to pain?

    <p>By enhancing the sensitivity of pain receptors</p> Signup and view all the answers

    What is the role of prostaglandins in the production of protective mucous in the stomach?

    <p>They directly produce the mucous in the stomach</p> Signup and view all the answers

    Which of the following is NOT a function of aspirin?

    <p>Initiating blood clotting</p> Signup and view all the answers

    What is the primary function of prostaglandins in stimulating the hypothalamus?

    <p>To increase body temperature</p> Signup and view all the answers

    Which hormone is found in the adrenal medulla and is secreted as preproAM, which is later cleaved to form mature AM?

    <p>Mid-regional AM (MR-proAM)</p> Signup and view all the answers

    Which receptors mediate the effects of adrenomedullin (AM)?

    <p>AM1 and AM2 receptors</p> Signup and view all the answers

    What are the downstream effects of adrenomedullin (AM) mediated by?

    <p>NO and in Phosphokinase A</p> Signup and view all the answers

    What is the half-life of adrenomedullin (AM)?

    <p>22 minutes</p> Signup and view all the answers

    What is the antagonist for adrenomedullin (AM)?

    <p>Adrecizumab</p> Signup and view all the answers

    What is the primary function of relaxin (RLX-1)?

    <p>Inhibition of Fibrosis and Remodelling</p> Signup and view all the answers

    What is the role of adrenomedullin (AM) in vascular injury?

    <p>Inhibition of Fibrosis and Remodelling</p> Signup and view all the answers

    What does neprilysin do to adrenomedullin (AM)?

    <p>Metabolizes it</p> Signup and view all the answers

    Which of the following is NOT a function of adrenomedullin (AM)?

    <p>Cardiac Output</p> Signup and view all the answers

    What is the function of adrenomedullin (AM) in vascular and smooth muscles?

    <p>Vasodilation</p> Signup and view all the answers

    Which enzyme is responsible for metabolizing adrenomedullin (AM)?

    <p>Neprilysin</p> Signup and view all the answers

    What is the primary function of adrenomedullin (AM) in vascular injury?

    <p>Inhibition of fibrosis and remodeling</p> Signup and view all the answers

    Which receptor(s) mediate the effects of adrenomedullin (AM)?

    <p>Both AM1 and AM2 receptors</p> Signup and view all the answers

    What is the half-life of adrenomedullin (AM)?

    <p>22 minutes</p> Signup and view all the answers

    What is the antagonist for adrenomedullin (AM)?

    <p>Adrecizumab</p> Signup and view all the answers

    Which of the following is NOT a function of prostaglandins?

    <p>Initiating blood clotting</p> Signup and view all the answers

    What is the primary function of adrenomedullin (AM) in vascular injury?

    <p>Promoting vasodilation and inhibiting smooth muscle proliferation</p> Signup and view all the answers

    How does aspirin relieve prostaglandin-induced pain, fever, and inflammation?

    <p>By blocking prostaglandin synthesis</p> Signup and view all the answers

    What is the role of prostaglandins in the production of protective mucous in the stomach?

    <p>Promoting the production of protective mucous</p> Signup and view all the answers

    Which enzyme does aspirin inhibit at the enzyme level?

    <p>Cyclooxygenase</p> Signup and view all the answers

    Study Notes

    Prostaglandins

    • NOT a function of prostaglandins: transmitting nerve impulses
    • One of the functions of prostaglandins in the body: stimulating the hypothalamus
    • Role of prostaglandins in the production of protective mucous in the stomach: they increase mucous production
    • Effect of prostaglandins on blood vessels: they cause vasodilation
    • How prostaglandins sensitize nerves to pain: they increase the sensitivity of pain receptors

    Aspirin

    • NOT a function of aspirin: transmitting nerve impulses
    • Enzyme that aspirin inhibits at the enzyme level: cyclooxygenase (COX)
    • How aspirin relieves prostaglandin-induced pain, fever, and inflammation: by inhibiting COX, which reduces prostaglandin production
    • How aspirin treats inflammation from some autoimmune diseases: by reducing prostaglandin production

    Adrenomedullin (AM)

    • Hormone found in the adrenal medulla and secreted as preproAM, which is later cleaved to form mature AM
    • Receptors that mediate the effects of adrenomedullin (AM): calcitonin receptor-like receptor (CRLR) and receptor activity-modifying protein (RAMP)
    • Downstream effects of adrenomedullin (AM) mediated by: cAMP and NO pathways
    • Half-life of adrenomedullin (AM): 22 minutes
    • Antagonist for adrenomedullin (AM): AM22-52
    • Primary function of adrenomedullin (AM) in vascular injury: vasodilation and reducing inflammation
    • Role of adrenomedullin (AM) in vascular and smooth muscles: relaxation
    • Enzyme responsible for metabolizing adrenomedullin (AM): neprilysin
    • NOT a function of adrenomedullin (AM): vasoconstriction

    Relaxin (RLX-1)

    • Primary function of relaxin (RLX-1): relaxing smooth muscles during pregnancy

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